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| Start date | Reporting criterion | Title | Event description | System | LER | |
|---|---|---|---|---|---|---|
| ENS 46423 | 20 October 2010 06:00:00 | Agreement State | Agreement State Report - Stuck Shutter | The following information was received via facsimile: On October 29, 2010, the licensee's RSO contacted DRH (Mississippi State Department of Health, Division of Radiological Health) about their inlet shutter/lock out device that would not close completely. The licensee had shutdown one of their Polymer lines for maintenance/turn around on October 20, 2010 and proceeded to the Disc Ring Reactor to lock out the rod source devices. The outlet rod source was retracted into the holder and shutter/lock out device was closed and locked. The inlet rod source was retracted into the holder but the shutter/lock out device would not close completely. On October 22, 2010, Berthold Technologies USA, LLC was contacted by the licensee to assess the problem and make repairs. On October 27, 2010, Berthold Technologies USA, LLC came to inspect and perform repairs on the insertion rod source. The maintenance technician fully retracted the source which allowed the shutter/gate to turn further, but not to the fully indicated closed position. The maintenance technician then verified the source was fully retracted by knowledge of the device and survey readings (12 inches from device 2.6 mR/hr at one end, average along length of device, 0.5 mR/hr). The device was then removed for further inspection and maintenance. The device was then locked in the off/closed position and remounted in its original location. Installation surveys were performed, but readings were not obtained as plant maintenance was being done in the area. The licensee was instructed by DRH to send in a written report describing the incidents leading up to the event that occurred on October 20, 2010, and any corrective actions or follow up performed. The requested report was received by (DRH) on November 5, 2010. DRH will notify NRC Operations and no other action is required by DRH. This device contains 7.41mCi of Co-60. The source serial number is 1772-10-02. The shield serial number is 005217. DRH considers the device to have been repaired successfully and fully operational at the present time. Mississippi Incident Report Number: MS-10007 |